Originally to produce a dark shade on denim using less Indigo for lower costs.Causticizing or Mercerizing Pre- Treatment : Sulphur Bottoming Pre-treatment is conducted in the 1st tank. Here are given some important dyeing processes related to indigo dyeing – specially on Rope Dyeing. This is a very technical description – read on if you are technically oriented. In recent years Oishi-San has devoted himself to experimenting with widely varying grammages, rough textures, different indigo dyeing techniques and novelty cuts while always maintaining a very limited production and wielding his experience in denim which now goes back more than 60 years.This is a guest post by Harry Mercer.

*Please, keep in mind that, due to low tension, 'Secret Denim' fabric will stretch quite a bit, so if your jeans are a tight fit at the start, don't worry because after just a few uses you will have gained the perfect fit. A high rise modern slim silhouette with a bit of extra room in the top block for comfort, tapering to a narrow leg opening. The cut is the iconic Oni 902 relaxed Tapered fit. The jeans are made with all the superior-quality ONI details such as copper buttons, high-quality pocket bags, heavy-duty bar tacks and a custom veg-tanned cowhide leather patch. The fading potential is incredible and will showcase super fast and highly contrasted fades. The weft yarn is light beige-dyed cotton. The result is a beefier, extremely knotty unsanforized 20oz fabric with a fantastic slubby and hairy texture. He uses extra-thick yarns of three different kinds of cotton woven at ultra-low tension on a vintage shuttle loom. Only Oishi-San can produce this denim, and no one else can reproduce it.

It is a bit rougher and more rigid than the standard secret denim, but it maintains all the standard version's slub and hair. This new dark indigo version features a deep indigo colour. First launched in 2012, the Secret Denim has been one of the most desirable denim fabrics by Denim Heads worldwide due to its unique texture, incredible softness and comfort. One of the most important types of denim in recent years has been Oni's Secret Denim. If you are looking for faster and more contrasted fades and love the superb texture of the secret denim, continue reading. This is a darker version of the iconic Secret Denim with a darker indigo warp and a lighter beige weft.

Which is darker indigo or dark denim?